If you have not cloned the skin, or made any alterations to it, just install the "Ninja" skin from the marketplace and use that going forward.
However, if you have customized it, read on:
There are 2 ways forward, keep the same code base, or update to the new. If you have just made a couple of alterations, it may be easier to install the "Ninja" skin and apply your changes to there.
If that seams like too much work, one known issue is that on the index page, in the "Latest Activity" area you will see "array" instead of the activity entry. This is because a lot has changed around the timeline system and the current skin requires changes to work.
The change is to locate this line around line 387 ish of index.tpl
ACP -> SKINS -> NINGJA -> TEMPLATES -> index.tpl -> MODIFY
{jrCore_list module="jrAction" order_by="_item_id numerical_desc" template="index_activity.tpl" pagebreak=12 page=$_post.p}
{jrCore_list module="jrAction" order_by="_item_id numerical_desc" pagebreak=12 page=$_post.p}
* click the SAVE CHANGES button
* click the CANCEL button
* in the 'active' column, locate the checkbox next to index.tpl, check it
* scroll to the bottom, click SAVE CHANGES
You may need to rest caches if that doesn't fix it immediately.
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Related Docs:
Docs: "Using the Template Editor"
https://www.jamroom.net/the-jamroom-network/documentation/jamroom-admin-handbook/3183/using-the-template-editor
updated by @michael: 07/08/21 02:07:25AM