Illegal length modifier specified 'f' in s[np]printf call on all pages

[Amandeep]

Whoops, looks like something went wrong.

(1/1) FatalErrorException

Error: Illegal length modifier specified 'f' in s[np]printf call

in Filesystem.php line 281

[Carlo-o]

On 8/27/2020 at 6:13 AM, Amandeep said:

Whoops, looks like something went wrong.

(1/1) FatalErrorException

Error: Illegal length modifier specified 'f' in s[np]printf call

in Filesystem.php line 281

Hi, did you fix it? I'm facing the same issue. Im not sure if it is a ps version bug or something that I did wrong. Wich version are you using?

[Mr.G]

My PS is 1.7.6.8 same error. Spent weeks trying to find an answer.

Update your PHP to 7.4.x it fixed the problem on 3 of my stores.

But the backend formatting gets messed up on product edit/add, customer edit and a few other pages. (CSS issue)

Workaround, I put the store on Maintenance change the PHP to 7.3.x make my edits, put PHP to 7.4.x and then re-enable the store.

Update your modules too.

Hope it helps.

Edited November 9, 2020 by Mr.G (see edit history)

[Carlo-o]

Hello @Mr.G Dont waste your time, try a fresh installation and dont use a higher php version, I know it doesnt have sense for security reason but you could take care about it later.

Seriously, try with php 5.6 and above.

Also maybe you need to rebuilt your nginx, if you're a shared hosting user you must request support for this.

I hope this information help you.

Kind regards.