BUG : Campaign DM access to MAPS VTT broken after renaming a token

Hello everyone

During a session on one of my campaign, my access as DM broke completely after renaming a token in MAPS VTT using the new token menu.

Player could still access to the player view, move token and perform dices roll but the DM view immediately shift to "something went wrong!" when i try to acces it.

It kinds of look like some datas are corrupted when VTT tryes to load maps and token.

Accesses to my other campaigns in VTT is still perfectly fine, the problem seems limited to this one session (doesn't seem to be an account issue so). 

Don't really believe it can be fixed for my peculiar case, campaign might be lost :'( ... but maybe there is a potential bug to investigate.

thanks for reading !