Windower has been updated. Relaunch the launcher and the bug should be fixed.
I'll try to ELI5: Organizer checks all items and parses the respective Extdata - a special property of each item, that is stored on your character, and contains stuff like augments, signatures, charges, linkshell names, items currently stored on slips, etc. Specifically, Linkshell names are stored in a compressed way: so a name like, say, VeryLongLinkShellName becomes a sequence of numbers, say 7616879321 - which takes less space.
Some linkshell names result in that number having a 0 in the middle, or even in the beginning. When the 0 happened at the beginning of the number, windower would tell organizer <<this linkshell pearl has a name of "">> (an empty string), and that was making Organizer confused. The update to windower makes it no longer cut on the first zero it encounters, but on the last, and that should be enough to always get the correct linkshell name.
That cur_val contains the CURrent VALue that Organizer is parsing out of all the extdata fields at a given time (to check if it's something it is supposed to store, or keep), and when it contained an empty string (zero characters long), it was giving you that error, and make organizer stop working.
With the new change you should not have to comment anything anymore. If you still get errors after updating windower and reloading the game, please send me a PM or come to windower's discord.