ctrl + a stopped working after installing the addon

[marcohald]

Thunderbird Version: 91.11.0 (64-Bit)
Addon Version: 2.2.0
ctrl+a to select all Mails in a folder stopped working after the installation of the addon.
This is my config:

{
    "j": "cmd:cmd_nextMsg",
    "k": "cmd:cmd_previousMsg",
    "o": "cmd:cmd_openMessage",
    "f": "cmd:cmd_forward",
    "#": "cmd:cmd_delete",
    "r": "cmd:cmd_reply",
    "a": "cmd:cmd_replyall",
    "x": "cmd:cmd_archive",
    "c": "func:MsgNewMessage",
    "u": "tbkeys:closeMessageAndRefresh",
    "ins": "cmd:cmd_toggleRead"
}

also tried to redefine ctrl +a but dint work

{
    "j": "cmd:cmd_nextMsg",
    "k": "cmd:cmd_previousMsg",
    "o": "cmd:cmd_openMessage",
    "f": "cmd:cmd_forward",
    "#": "cmd:cmd_delete",
    "r": "cmd:cmd_reply",
    "a": "cmd:cmd_replyall",
    "x": "cmd:cmd_archive",
    "c": "func:MsgNewMessage",
    "u": "tbkeys:closeMessageAndRefresh",
    "ins": "cmd:cmd_toggleRead",
    "ctrl+a": "cmd:cmd_selectAll"
}