Cannot launch or remove iTunes from Mac High Sierra
Issue: when launching iTunes, it closed immediately after clicking the icon and appeared in half a second, then error screen appeared to ask for "ignore", "report", etc. Solution: Finder ->…
Mail Server Already Exists error iPhone iOS 11
Issue: When open an email box, error appeared on iPhone warning: Cannot verify Mail Server Identity. One solution for this problem is to delete that mail account on iPhone and…
WordPress Duplicator Plugin Server Error 500
Issue: During scanning stage of running the Duplicator plugin on a WordPress site, there was an error: Server Error 500. Solution: Modify /etc/php.ini file to increase memory: memory_limit = 256M…
WP Fastest Cache Plugins Update Issue
Issue: After installing WP Fastest Cache plugin, whenever update any plugin, there is error - Update failed. Could not remove old plugin. Solution: Go to WPFC at the top bar…
hsla HTML Color Scheme
Just learnt how to use hsla (hue, saturation, light, alpha) html color scheme from Castro's HTML5 and CSS3. I found it's beauty that it is more logical to think of various…
Scrolling to Section ID Missing
Issue: When moving some of the content to a single page design, the menu link will be addressing the div id instead of another page. But after all set up…
WooCommerce Showing Unmatched Variations
Issue: error: "Sorry, no products matched your selection. Please choose a different combination." WooCommerce in WordPress shows all variations of variable product including unmatched variations thus the above error message may…
WordPress Custom CSS Disappear
Background: It is quite terrifying if suddenly all the custom CSS disappear and you do not have a backup of the text of the custom CSS that is not just one or…
MathJax Incompatibility to LaTex
Issue: "Error: Missing argument to \begin" when using \color command and together with \boxed command in WordPress with MathJax plugin as if they are under LaTex syntax. Solution: Adding {}…
iMac View Camera Capability
Issue: While conducting Online Live Class using Join.Me, and I need to select real-time video as profile. However, it seems that the built-in view camera in iMac cannot make any adjustment.…