Edit2: Wow, thanks for the fast moving!
first of all: unfortunately I cannot reproduce this error (yet)! Sorry for that already, but maybe the error message already rings a bell:
It happened, when I opened the plugin picker. This message appeared and the plugin picker was empty. I closed it, reopened it and everythign was ok again.Access violation at address 00007FFF8B51DE0D in module 'ntdll.dll'. Read of address FFFFFFFFFFFFFFFF.
FL Version: v20.5 build 1125
OS: Win 10 64 bit
Ok now it gets more frequent and also while trying to just open a plugin from the mixer. After that FL even crashes. And additionally to this a project just said that a state for a certain plugin could not be saved and FL crashed. The plugin was MStereoProcessor and another time MSoundFactory. Both VST3 versions of the plugins.
Can this be a Meldaproduction issue as well?
I am not 100% sure yet, but it could be that the issue is somehow related to this topic:
... Youlean already wrote that there is a problem with the VST3 version of the Youlean Loudness Meter v2.2.4 - I'll come back to this topic and give updates, if I get the error again without Youlean Loudness Meter involved!