Riseupvpn crashes on Kubuntu 18.04

I think the issue starts after rebooting. I'm not sure if it is related, but I don't get immediately an Internet-Connection, because I have to fill in a password first. The bitmask-root window pops up after the reboot. I enter that password as well and I get an error message after clicking on 'OK'.

I think it was that: There is a running process with the pid 3370 and executable: riseup-vpn Error acquiring PID: Another systray is running with pid: 3370

Even though, the tray icon appears! if I left-click on it and click in the menu on 'turn on', the app crashes with a null pointer exception.

The corresponding log:

qml: systray init completed
qml: show systray
qml: Platform: linux
qml: DEBUG: Pre-seeded providers:
qml: {
    "default": "riseup",
    "providers": [
        {
            "apiURL": "https://api.black.riseup.net/",
            "applicationName": "RiseupVPN",
            "askForDonations": "true",
            "auth": "anon",
            "authEmptyPass": "false",
            "binaryName": "riseup-vpn",
            "caCertString": "-----BEGIN CERTIFICATE-----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\n0BuC1b7uW/bBn/xKm319wXVDvBgZgcktMolak39V7DVO\n-----END CERTIFICATE-----",
            "donateURL": "https://riseup.net/vpn/donate",
            "geolocationAPI": "https://api.black.riseup.net:9001/json",
            "helpURL": "https://riseup.net/support",
            "name": "Riseup",
            "providerURL": "riseup.net",
            "timeStamp": "2021-03-11 18:00:11",
            "tosURL": "https://riseup.net/tos"
        }
    ]
}

2021/03/31 00:57:11 There is a running process with the pid 3370 and executable: riseup-vpn
2021/03/31 00:57:11 Error acquiring PID: Another systray is running with pid: 3370
qml: ERRORS: Another systray is running with pid: 3370
qml: ERRORS: Another systray is running with pid: 3370
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x30 pc=0x55f980835fac]

goroutine 26 [running]:
0xacab.org/leap/bitmask-vpn/pkg/backend.connectionCtx.updateStatus(0xc0000d66d0, 0x9, 0xc0000d66c6, 0x6, 0xc0000f4200, 0x16, 0xc0000f4220, 0x1a, 0x1, 0xc0000f4240, ...)
        /root/parts/bitmask-vpn/build/pkg/backend/status.go:66 +0x9c
created by 0xacab.org/leap/bitmask-vpn/pkg/backend.setError
        /root/parts/bitmask-vpn/build/pkg/backend/api.go:44 +0xdd
Abgebrochen (Speicherabzug geschrieben)