Access violation while editing (C language)

Exception description:
I've no idea... I was just editing C- code (that contained a "(" which it highlighted in red) and it locked up

Access violation at address in module 'PSPad.exe'. Read of address .

Exception class:
Exception address:
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Stack list, generated 04/11/2020 09:29:19

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Thank you for your time to report this issue!
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Please don't post exception report into the forum.
Send it to my support address (see Help > About).
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And please add a short description what you did when exception occurred,
e.g.: close file (generic advice, nothing special to you)
In some cases I am else not able to recognize what caused exception.
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- What did you do: ....<accurate step-by-step instructions here>..
- How did you do: by keyboard press, by menu, context menu, macro
- You had expected to get: ....
- But you got instead: .....
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Thank you.

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Program : C:\Program Files (x86)\PSPad editor\PSPad.exe 4.5.7 (2450)
System : Workstation x64, Version: 6.2, Build: 23F0,
Processor: Intel, Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz, 2490 MHz MMX
Display : 1600x900 pixels, 32 bpp
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Active Controls Hierarchy:
TPSSynEdit ""
TfChildEdit ""
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Edited 1 time(s). Last edit at 2021-04-28 13:47 by Stefan.