My player's Character Sheet just broke (D&D 5E)

We were now leveling up our characters from lvl 10 to 12, some of the players had already leveled up and me and another player were leveling up his character until we noticed his sheet was all messed up. He could not roll Saving throws and when i rolled a Strength saving throw for him (wich he has +7 to it) it only rolled a +4, and most other it rolled -4, -3 or -5, some where 0 and when i checked all the other characters, including those that had already leveled up BEFORE where all displaying the same error, can someone help me?, there are some "new" players in my campaign and i don't want to go through the whole process again (even if it is only copying and pasting).

Screenshots taken by me as an example, all the rolls where also made by me. The player told me he sees different numbers in his saving throws (instead of being 7 Strength it is 4 Strength i guess)

It's hard to tell from just these screenshots. If you hover over the rolls what does the little popup say? Also can you take a screenshot of the setting page for the character? There are some settings there that affect saving throws and those could be part of the problem.