On one tenant, starting today, whenever I try to open any of the PowerApps in Studio (by clicking the ellipses in make.powerapps.com and choosing edit) I get the following message:

My users, when trying to opening in the Player are sometimes getting in and sometimes getting 'This app stopped working. Try refreshing your browser.'
I am doing work on other tenants and so far the Apps on those tenants are opening normally in both Edit and Play mode.
This issue is affecting all three App I have tried opening in Edit mode so far.
I am using Chrome web browser.