OTF font cant be loaded suddenly

Please include the flowing when reporting a bug:

Win 11 rs 22581
FB 2.16.9

Lots of my OTF fonts which i load from a dedicated Root folder suddenly wont load. I get this error “cant not activate font”. These fonts used to load just fine

Screengrab would only show the error card in the bottom left

Perhaps be nice if we could see a log or anything

Hello @rombout, welcome to the forum, thank you for your post and sorry for the delay in replying.
Is there a way to figure out the point in time, at least an approximate one, when this behaviour started?
Was it after a FontBase update, any changes to the operating system, or maybe something else?
Also, when you say load, do you mean activate?
Are the OTF fonts copied to the Root folder, or are they added via a watched folder?
Is either your root or the folders containing the OTF files on a network drive?
Sorry for the number of questions, trying to figure out what and how could have gone wrong.
Thank you again,
Yuriy
FontBase Dev Team