Hi, MrZnuk, Same issue here. I just found the sidebar icon of Dropbox rendered properly.

Same issue here. Termination Description: DYLD, Assertion failed: (gotLocation), function applyFixupsToImage_block_invoke_3, file /Library/Caches/com.apple.xbs/Sources/dyld/dyld-750.4.2/dyld3/Loading.cpp, line 779. https://opensource.apple.com/source/dyld/dyld-750.5/dyld3/Loading.cpp Search for fixupObjCStableSwift.

Same issue: https://developer.apple.com/forums/thread/727680