Insync not working on Gnome 40 (with workaround)

Fedora 34, Gnome 40, Wayland, insync 3.3.9.40955 and 3.3.10.40961

This is not working:

insync start --no-daemon
Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
Segmentation fault (core dumped)

This command instead:

QT_QPA_PLATFORM=wayland insync start --no-daemon
Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
QSocketNotifier: Can only be used with threads started with QThread
Using Wayland-EGL
libEGL warning: MESA-LOADER: failed to open radeonsi: /usr/lib/insync/libstdc++.so.6: version `GLIBCXX_3.4.29’ not found (required by /usr/lib64/dri/radeonsi_dri.so) (search paths /usr/lib64/dri)

libEGL warning: MESA-LOADER: failed to open swrast: /usr/lib/insync/libstdc++.so.6: version `GLIBCXX_3.4.29’ not found (required by /usr/lib64/dri/swrast_dri.so) (search paths /usr/lib64/dri)

failed to initialize EGL display
WARNING:root:While reading /usr/share/applications/mimeapps.list
Traceback (most recent call last):
File “idesklinux/application_manager.py”, line 53, in __index_default_apps
File “configparser.py”, line 696, in read
File “configparser.py”, line 1091, in _read
configparser.DuplicateOptionError: While reading from ‘/usr/share/applications/mimeapps.list’ [line 331]: option ‘image/tiff’ in section ‘Default Applications’ already exists
WARNING:root:While reading /usr/share/applications/gnome-mimeapps.list
Traceback (most recent call last):
File “idesklinux/application_manager.py”, line 53, in __index_default_apps
File “configparser.py”, line 696, in read
File “configparser.py”, line 1091, in _read
configparser.DuplicateOptionError: While reading from ‘/usr/share/applications/gnome-mimeapps.list’ [line 331]: option ‘image/tiff’ in section ‘Default Applications’ already exists
WARNING:root:While reading /usr/share/applications/gnome-mimeapps.list
Traceback (most recent call last):
File “idesklinux/application_manager.py”, line 70, in __index_apps_for_mimetypes
File “configparser.py”, line 696, in read
File “configparser.py”, line 1091, in _read
configparser.DuplicateOptionError: While reading from ‘/usr/share/applications/gnome-mimeapps.list’ [line 331]: option ‘image/tiff’ in section ‘Default Applications’ already exists
WARNING:root:While reading /usr/share/applications/mimeapps.list
Traceback (most recent call last):
File “idesklinux/application_manager.py”, line 70, in __index_apps_for_mimetypes
File “configparser.py”, line 696, in read
File “configparser.py”, line 1091, in _read
configparser.DuplicateOptionError: While reading from ‘/usr/share/applications/mimeapps.list’ [line 331]: option ‘image/tiff’ in section ‘Default Applications’ already exists
libpng warning: iCCP: known incorrect sRGB profile
INFO 2021-05-18 09:06:20,896 [mainlogs:_log_run:139] Core(app_version=3.3.9.40955, platform=Linux-x86_64-fedora/34) initialized
INFO 2021-05-18 09:06:21,125 [fswatcher:_start:57] LinuxFSWatcher._start
INFO 2021-05-18 09:06:21,125 [inotify_manager:_pull_loop:312] Inotify loop enter
INFO 2021-05-18 09:06:21,242 [fswatcher:watch:77] watch origin: /home/andream/Insync/maan559@CIRA.IT/OneDrive Biz
INFO 2021-05-18 09:06:21,246 [fswatcher:_start:57] LinuxFSWatcher._start
INFO 2021-05-18 09:06:21,247 [inotify_manager:_pull_loop:312] Inotify loop enter
WebEngineContext used before QtWebEngine::initialize() or OpenGL context creation failed.
INFO 2021-05-18 09:06:21,303 [fswatcher:watch:77] watch origin: /home/andream/Insync/artu72@gmail.com/Google Drive
INFO 2021-05-18 09:06:21,307 [main:start_core:49] core started
INFO 2021-05-18 09:06:21,307 [unix_socket_server:start:57] unix socket server thread start
libpng warning: iCCP: known incorrect sRGB profile

apart a lot of warning, it is working.

UPDATE: I then found the workaround in this link: Insync not start and now it is working again.

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