PCRE Pattern Compilation Error


I've recently installed RStudio server onto a box running OL7 (enterprise) and am having a few issues.

I am fairly new to Linux so please excuse any silly comments / questions.

I eventually got it so the server was accessible via web browser on our internal network after fixing a few folder permission issues so all good now and I can log into the IDE via a browser.

Now, if I try to run many different things such as installing a package I get a PCRE Pattern Compilation error:


Even just trying to use help() gives the same error.

I have R version 3.6.1 installed which is the latest I think I can get under Oracle Linux 7 (we have to use this version).
Running rpm -qa |grep pcre gives the following:

Any help would be massively appreciated.


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