Scan Engine Error: The signature on the request to start a scan is invalid.

  • Resolved jatrading

    (@jatrading)


    1 year, 3 months ago

    I am unable to complete a scan on my WP website.

    I get the following error message:
    Scan Engine Error: The signature on the request to start a scan is invalid. Please try again.

    I have tried deleting and reinstalling Wordfence
    I have tried the steps in the debugging area
    I have changed my php settings
    I have increased memory in wp-config
    I have tried disabling my plugins one by one

    I have 4 other sites all experiencing the same issue

    I have contacted my host to do a check of any blocked ip’s and the database isnt showing any issues,

    Does anyone have any ideas?

    Here is the last few degug messages:

    • [Aug 23 07:31:20] Scan Engine Error: The signature on the request to start a scan is invalid. Please try again.
    • [Aug 23 07:32:37] Attempting to resume scan stage (1 attempt(s) remaining)…
    • [Aug 23 07:32:40] Scan Engine Error: The signature on the request to start a scan is invalid. Please try again.
    • [Aug 23 07:34:31] Attempting to resume scan stage (0 attempt(s) remaining)…
    • [Aug 23 07:34:34] Scan Engine Error: The signature on the request to start a scan is invalid. Please try again.
    • [Aug 23 10:33:46] Scan stop request received.
    • [Aug 23 10:33:47] Scan stop request received.
    • [Aug 23 10:33:57] Scan Engine Error: The signature on the request to start a scan is invalid. Please try again.
    • [Aug 23 10:35:51] Attempting to resume scan stage (1 attempt(s) remaining)…
    • [Aug 23 10:35:54] Scan Engine Error: The signature on the request to start a scan is invalid. Please try again.
    • [Aug 23 10:37:20] Attempting to resume scan stage (0 attempt(s) remaining)…
    • [Aug 23 10:37:22] Scan Engine Error: The signature on the request to start a scan is invalid. Please try again.
Viewing 4 replies - 1 through 4 (of 4 total)

  • I’m also expiriencing this issue across a number of site’s I manage, I’ve sent diagnostic reports, but haven’t recieved any reply. Does anyone have expirience of the standard response times with the FREE licences?

    Plugin Support wfphil

    (@wfphil)

    Hi @omnisity

    Disabling the plugin below should fix the failed scans for you:

    Change wp-admin login

    Hi Phil,

    Thanks for getting back to me, i can confirm disabling the plugin has enabled scanning for two sites (checked so far), I’ll check the rest i’m having issues with and report back should they not have this plugin installed.. Safe to assume it’s a conflict with this plugin then?

    Looking at log, it’s only started happening from around August 10th which may correspond to the last update, is it worth me opening a support ticket with them?

    We like to change the Admin login page, as another security measure, so it is functionality we’d like to keep if possible.

    SiteBolts

    (@sitebolts)

    For anyone else having this issue, the developers of the Change WP-Admin Login plugin have identified the bug and will be releasing a fixed version soon. If you need it before then, you can download their patched beta version.

    https://www.ads-software.com/support/topic/problem-with-wordfence-3/

Viewing 4 replies - 1 through 4 (of 4 total)
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