OK, we’ll retest PHP 7.1 then. Perhaps all sorts of patches that you guys came up with in the meantime have fixed the issues I was referring to. Speaking of plugins, is there a directory of current (stable or not) plugins, like WordPress has?
Since asmecher is unavailable, can you address these pressing (monetary) issues addressed at him: here and here.
Most importantly: how are manual payments actually integrated with OJS3? User Manual is very general and doesn’t cover this issue. Is there some technical documentation? For example, how does an unsubscribed buyer who manually purchases a single article access just that article (with and without creating a user account)? I searched everywhere but to no avail.