Sorry I cannot read the screenshot - can you maybe post a larger image, or copy the text from the error message and post it again - i.e. edit your post? Thank you!
Thank you for editing your question, I can now edit also my answer ->
java.nio.file.AccessDeniedException: C:\Program Files (x86)\openLCA\openLCA.ini
this shows that you do not have access to the folder where openLCA is installed, and therefore cannot change the configuration file that sits there. This happens if openLCA has been installed by an admin e.g. and you are not admin on your computer. Just use the zip archive for openLCA, extract it into your user directory, start openLCA exe and adjust the memory allocation there.
(as an afterthought, you can also ask the admin to change the memory but this is really a 2nd best option)