This error is displayed when the data returned (via AJAX) by the command is empty.
Did you try to select another PHP function for command execution in the “Settings” tab?

1. Go to the “settings” tab, select “system” for the PHP function and save the settings.

2. Open “wpterm.php” and locate this line:

// Run the command:
list( $res, $ret_var ) = @run_command( $command, trim( $_POST['exec'] ) );

Right below, add this code:

@file_put_contents( '/full/path/to/debug.txt', "-\$res = {$res}\n=========\n-\$ret_var = {$ret_var}\n" );

3. Replace /full/path/to/debug.txt with the full path to the debug log you want to create (it must be writable).

4. Go back to the terminal and enter the uname shell command.

5. Check the debug.txt log and paste its content here.

6. After your test, remove the line you added to the “wpterm.php” file.

-$res = SunOS
[-{–}-]

=========
-$ret_var = 0

1. Search and remove this line of code:

$command = sprintf( "ABSPATH=%s;cd %s;%s 2>&1;echo [-{-%s-}-]", $abs, $cwd, $cmd, '$PWD' );

2. Replace it with this line:

$command = sprintf( 'ABSPATH=%s;cd %s;%s 2>&1;echo [-{-$(pwd)-}-]', $abs, $cwd, $cmd );

If it works, I’ll make the change to the next update of WPTerm.

something changed. The error message is now:

WPTerm: error 2

Sorry, Oliver

-$res = Array
=========
-$ret_var = 2

Best regards

Oliver