I am fairly new to RPA and this is basically about my first bot, so please don't eat me alive:)

I noticed that the execution of the same bot in builder mode and attended mode tends to give different results - of course some of this is inevitable due to the builder mode showing the OpenBots window, which activates on each line execution, however there are more subtle things as well, one of which I don't seem unable to find my way around:

My bot needs to pull some information from an application that is accessible only through... a Citrix remote window. I managed to handle the task with relative reliability using image recognition, however in the Attended mode, I seem to run into an issue right away - the bot activates the Citrix window and is supposed to click on a button, however it throws out an error

Error: System.ObjectDisposedException: Cannot access a disposed object.
Object name: 'frmScriptEngine'.

This is the entire log for the relevant part:

2021-06-02 10:14:00.256 +02:00 [INF] Resuming Parent Task: Main.obscript
2021-06-02 10:14:00.277 +02:00 [INF] Running Line 4: Get report - Run Task [Run '{ProjectPath}\03XXXX.obscript']
2021-06-02 10:14:00.372 +02:00 [INF] Executing Child Task: 03XXXX.obscript
2021-06-02 10:14:00.419 +02:00 [INF] Engine Class has been initialized
2021-06-02 10:14:00.419 +02:00 [INF] Client requesting to execute script using frmEngine
2021-06-02 10:14:00.419 +02:00 [INF] Bot Engine Started: 02/06/2021 10:14:00
2021-06-02 10:14:00.450 +02:00 [INF] Deserializing File
2021-06-02 10:14:00.456 +02:00 [INF] Script Path: C:\Users\XXXX\AppData\Local\Temp\OpenBotsStudio\XXXX_1.5.0\03XXXX.obscript
2021-06-02 10:14:00.958 +02:00 [INF] Creating Variable List
2021-06-02 10:14:00.973 +02:00 [INF] Creating Argument List
2021-06-02 10:14:00.989 +02:00 [INF] Creating Element List
2021-06-02 10:14:01.005 +02:00 [INF] Creating App Instance Tracking List
2021-06-02 10:14:01.036 +02:00 [INF] Running Line 5: Activate Window [Window 'My Beloved Citrix Gateway - \\Remote']
2021-06-02 10:14:01.105 +02:00 [INF] Running Line 6: Click XXXX Icon - Surface Automation [Click Image on Screen - Accuracy '0,8']
2021-06-02 10:14:01.190 +02:00 [INF] Result Code: Error
2021-06-02 10:14:01.190 +02:00 [ERR] Error: System.ObjectDisposedException: Cannot access a disposed object.
Object name: 'frmScriptEngine'.
   at OpenBots.Engine.AutomationEngineInstance.ExecuteCommand(ScriptAction command)
2021-06-02 10:14:01.259 +02:00 [INF] Resuming Parent Task: Main.obscript
2021-06-02 10:14:01.259 +02:00 [INF] Result Code: Error
2021-06-02 10:14:01.259 +02:00 [ERR] Error: System.InvalidOperationException: Invoke or BeginInvoke cannot be called on a control until the window handle has been created.
   at OpenBots.Engine.AutomationEngineInstance.ExecuteCommand(ScriptAction command)

Any idea what might be the problem?