Hi, dunno if anyone said the same before (looked but cdn´t find anything), there is some weird incompatibility with vamstoryvfx plugin... sometimes it gets bugged, and in my experience one of 2 things happen:
1.- the scene gets stuck in "loading custom unity assets" forever
2.- the scene opens but all plugin instances of Vamstory get nullified.... no panels, no interface, no nothing... as if the plugins were blank. Doesn´t matter if you reload them, if you try to add a new action nothing happens...
Happened to me in 2 scenes so far... one of them didn´t even have any instance of Vamstoryvfx in it

. I thought the scenes were corrupted and i had lost them, so i did a clean Vam install, and started to try load the scenes restoring addons to the folder one by one (i have 785 addons atm, so it was pretty exhausting hehe), until i found out that taking out vamstoryvfx.var out from the folder everything got fixed... scenes loaded ok, and Vamtory panels appeared again with no problems.
Worst thing is that it doesn´t give any errors when the problem happens... so i cannot help you to poinpoint the problem. All i can say to help is that the first time it happened, when the scene got stuck in "loading custom unity assets", i downgraded Vamstoryfx from version 4 to version 3 and it fixed it, but the second time (when vamstory got nullified), it was with version 3 of vamstoryvfx and only uninstalling Vamstoryfx fixed it.
If u need any info on the scenes or something i can help with just ask

thanks for the wonderfull plugins!