I thought I did this today but it was actually for the Madrid Theatro Real Audio Guide tour that was having a similar problem. In the case of the Theatro Real web site, it does seem flakey. In general, when these overseas sites seem difficult, I recommend the following:
- Use a large screen computer display, NOT a tablet or phone. The page
translation down to smaller sizes sometimes seem to not be tested
very well.
2.Use the site in its native language, in this case Spanish
(esp or maybe even Catalonian). Peruse site in English if needed and
then switch to Spanish when something seems to "disappear".
Disclaimer: The above comes from 35+ years as a full stack software developer/analyst who has seen every imaginable problem from software (especially web user interfaces) that is not adequately tested in all scenarios.
Good luck, I will also be after those same Barcelona/Picaso tickets in mid march so if anyone cracks this case, let us know.