The current version delivered with the extensions are quite old. Ruby 2.4.4 is nearly a year old (28.3.2018) !
Please provide the current stable versions, see https://www.ruby-lang.org/de/downloads/ :
- 2.4.52 votes
Thank you for your input. Support of Ruby 2.6.x is planned for Plesk Onyx 17.9 in one of future updates.
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