Can't update MissionPlanner to beta on Linux

OS: Linux Mint 20.1
Mono JIT compiler version

I’ve went to Help screen and pressed the latest Beta version button, but it doesn’t work. A small window pops-up and something loads then it closes itself and never opens.
I’ve tried it several times but the version is remains

I sometimes get errors like “Update Failed Too many open files”

I’ve got the same problem.
Fedora 36, KDE, X11
Mission Planner 1.3.76
mono-complete 6.12.0-6

ERROR MissionPlanner.MAVLinkInterface - System.IO.IOException: Too many open files
at System.IO.Ports.SerialPortStream.ThrowIOException () [0x00012] in <3f672a941b5f466fb5dc321b3015c863>:0
at System.IO.Ports.SerialPortStream…ctor (System.String portName, System.Int32 baudRate, System.Int32 dataBits, System.IO.Ports.Parity parity, System.IO.Ports.StopBits stopBits, System.Boolean dtrEnable, System.Boolean rtsEnable, System.IO.Ports.Handshake handshake, System.Int32 readTimeout, System.Int32 writeTimeout, System.Int32 readBufferSize, System.Int32 writeBufferSize) [0x0001e] in <3f672a941b5f466fb5dc321b3015c863>:0
at (wrapper remoting-invoke-with-check) System.IO.Ports.SerialPortStream…ctor(string,int,int,System.IO.Ports.Parity,System.IO.Ports.StopBits,bool,bool,System.IO.Ports.Handshake,int,int,int,int)
at System.IO.Ports.SerialPort.Open () [0x00078] in <3f672a941b5f466fb5dc321b3015c863>:0
at MissionPlanner.Comms.WinSerialPort.Open () [0x00096] in <33b4a7afd218414793dd695e246b2e03>:0
at MissionPlanner.Comms.SerialPort.Open () [0x00001] in <33b4a7afd218414793dd695e246b2e03>:0
at MissionPlanner.MAVLinkInterface.OpenBg (MissionPlanner.Utilities.IProgressReporterDialogue PRsender, System.Boolean getparams) [0x000f2] in :0
HUD 1 hz drawtime 1 gl True
HUD 1 hz drawtime 1 gl True
HUD 1 hz drawtime 1 gl True