Not able to update using: sudo pacman -Syu

Support AUR
3

When you sync your system any CUSTOM package may cease to function without warning OR your system may cease to function due to a CUSTOM package
– [Need-To-Know] About Manjaro and AUR

In this case you have built syncthingtray using a custom script

To succesfully sync using pacman -Syu (the commands to do so is described in the preceding comment)

  1. need to remove syncthingtray
  2. sync your system
  3. rebuild syncthingtray

This is not an error

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