Flow elements “disappear” when reopen the PsychoPy 1.9


I am experiencing a ‘routine disappear’ issue that when I save the changes of the experiment in the PsychoPy 1.9 version. I am using the builder in PsychoPy version 1.90, and now whenever I open the .psyexp file, I can see that all routine tabs are intact but are no longer appearing in the flow section. Any changes to the routine tabs are still saved and can be seen when reopening, but inserting routines to the flow section and then saving still results in an empty flow section upon reopening. This remains the case after de- and re-installing PsychoPy. Unfortunately, updating to a new version of PsychoPy is not an option due to certain experimental set-up restrictions.

Any advice on how to fix this would be greatly appreciated.
Thank you for any help in advance!