Player cannot roll with controlled NPC.

I have created a folder with several wild shapes for our groups moon druid. Tokens are connected and creatures have been added by dragging from the compendium. Permissions are set for both GM and player to control. PC can access sheets and control token but CANNOT click attack entries to roll for to hit and damage. This works fine for GM and fine for GM when entered in the game as a player. Player says a syntax type message/error appears when attack is clicked. I, as the GM, cannot see this message and cannot think of what is going wrong. Can anyone shed some insight into this please?

Screenshots would be immensely helpful.  Have you tried using a Dummy Account to test? It is immensely more useful than ‘Rejoin as Player’ for this specific reason.  

I do not have a screen shot, as only the player has been able to recreate the issue thus far. (And I did not think of asking her for one).  I have not tried a dummy account yet. But thank you for the suggestion, I will try that. 

Possibility: Make sure both permissions are set for the character: view and edit. also, linkie:  Dummy Account

Sounds like you are using macros for attacks and not the sheet. Open the macro and scroll to the bottom. Give “all players” permission to use the macro.

This is a screen shot from the player. The bear is created by dragging from the compendium and giving control/edit permission to the player. As the GM I do not get this error. Nor do I get it with a dummy account.

The first two ideas that come to mind: Do you have more than one 'Brown Bear' creature in your journal?  If you have more than one creature with identical names, then it can cause problems; e.g. if you gave permission on one of them but not the other, Roll20 might be trying to pull attributes from the wrong character (that the player doesn't have access to). One easy troubleshooting check would be to simply change the name of the character to 'Brown Bear Wildshape' and see if that fixes it. Does your player have any browser extensions enabled that might be interfering with Roll20? I would suggest having them open the game in a different browser or a private browsing window to make sure. (This is far less likely.)

Jarren,    I searched and found no duplicates of any sort. I changed the name and will test it at our next game. The only thing I noticed from the player's screen shot is she is using Dark Mode. Would this have any effect? I know Dark Mode doesn't like VTT Enhancement Suite. As far as I know she is using no extensions, but I will check on that.

VVTES is known to cause other issues, even though it provides some nice functionality. But fyi it also allows for pirating of sourcebook info and isn’t highly regarded in some communities because of that. 

I use it for the level labels it provides on created maps, tokens, etc.  I would have thought something so useful would be a standard feature on Roll20. Didn't know you could add sourcebook info through it, as such I have been using the base compendium material that Roll20 provides or directly entering it myself for stat/ability creation.  But I know anything that has the ability to pirate info can be a bit touchy so I will refrain from mentioning that here.  That said, I have tried the same setup without enabling VVTES, thinking it my be an issue caused by my side. No luck, still had the same issues. And something I have not mentioned thus far... Thank you everyone, for the assistance with this.

Created a dummy account as suggested. Everything works fine. Yet the singular player still cannot use the generated attacks and must use either a directly entered roll or the dice roller from the control menu. I am at a complete loss. Could this be something player side? My player is running Chrome and has minimal extensions installed, including nothing designed to effect/enhance roll20. I have tried to duplicate the issue following her settings for Chrome and have as yet not been able to. I created all the npcs in question and a second player also has summons, created the same way, that function fine.

VTTES is not able to add sourcebook info. That is a different extension. VTTES is generally safe to use, though I usually recommend against it, since I feel the minor functionality adds are offset by the extra layer of problem solving when something goes wrong. As for your player's problem, if you have followed all of her setup and cannot duplicate the issue, there may be a fundamental communication problem. Is it possible for her to screen share with you, so you can see exactly what she is doing? Also, can you open the Brown Bear, click edit and show the permissions as a screen shot? It might solve your problems if you set permissions to "All Players". Also—and this shouldn't be a problem, but—have them change their name to something without an emoji. Just use common characters in their player name field. An emoji should be OK, but it's something to try.

Oh, and I didn't see an answer to your other query, but it is extremely unlikely that Dark Mode has anything to do with this.

Here are the permissions. They appear to be the same as my other player who has functioning summons. Experimented with: Dark Mode - no change VTTES (Disabled/Removed) - No change Running Firefox instead of Chrome - No change (Although this did fix a separate issue I was having with animated tokens!) We have not tried removing the emoji from the player's name but will if nothing other than to rule it out. Nor have I set control to All Players, but will also try this.

Yeah, I renamed my  Dummy Account  with the d sparkle emoji and was able to run everything just fine. Just running low on ideas. In this light of scrambling for possibilities, I know you have searched for duplicates (in this case, brown bear) and found nothing, but have you checked to see if any are archived? Also, have you tried setting up a brand new test game with your player to see if the issue continues with the "slate wiped clean"? If neither of these is successful, it might be time to file a  Help Center Request  and get some real devs working on this. They may need to contact your player. Alternatively, if you want someone like me to take a look, I'd be willing to. If so, shoot me an invite (via private message!) and promote me to GM. I'll poke around and see if I can't see something I'm not thinking of in the abstract.

I figured it out!  What occurred was I had a duplicate folder with the same wild shape tokens copied and pasted from the original ones. The permissions had been set to myself and the two individual players, so that they could only control their own tokens. Apparently Roll20 took issue with that, because once I deleted the copies with permission for player 2, Player 1 could control their own tokens without issue. As Player 2 has since quit deletion solved the issue I was having!  Thank you to every one that assisted me in this!  It is greatly appreciated! This does leave me with a lingering question however.  Should another player gain the ability to summon the same creature as the first player is there a functioning method to set individual permissions that does not end up like the above problem?