AMP syntax Errors

Hi, how to eliminate syntax errors on AMP pages?
For example: https://mobirank.pl/2016/03/27/facebook-omylkowo-uruchomil-safety-check/amp/

In developer mode > Console there is a lot of errors”

Powered by AMP ? HTML – Version 1458430572640
Failed to load resource: net::ERR_RESPONSE_HEADERS_TRUNCATED
Failed HTTP request for  <img amp-img-id=?"AMP_2" class=?"-amp-fill-content -amp-replaced-content -amp-error -amp-element-error -amp-ghost" width=?"24" height=?"24" src=?"https:?/?/?secure.gravatar.com/?avatar/?49b9bbc6aca5ae93e4d19ab85fe7415e?s=24&r=g" error-message=?"task failed:? amp-img#2#L amp-img#2:? Failed HTTP request for img.​?​?​?">?::before?</img>? .
Uncaught Error: task failed: amp-img#2#L amp-img#2: Failed HTTP request for img.???
Uncaught (in promise) Error: Failed HTTP request for [object Window].???(…)
AMP validation had errors:
https://mobirank.pl/2016/03/27/facebook-omylkowo-uruchomil-safety-check/amp/:333:0 The tag 'script' is disallowed except in specific forms.
Failed to load resource: net::ERR_RESPONSE_HEADERS_TRUNCATED
Failed HTTP request for  <img amp-img-id=?"AMP_5" alt class=?"-amp-fill-content -amp-replaced-content -amp-error -amp-element-error -amp-ghost" width=?"80" height=?"80" src=?"https:?/?/?secure.gravatar.com/?avatar/??s=160&r=g" error-message=?"task failed:? amp-img#5#P amp-img#5:? Failed HTTP request for img.​?​?​?">?::before?</img>? .
Failed HTTP request for  <img amp-img-id=?"AMP_4" alt class=?"-amp-fill-content -amp-replaced-content -amp-error -amp-element-error -amp-ghost" width=?"80" height=?"80" src=?"https:?/?/?secure.gravatar.com/?avatar/??s=160&r=g" error-message=?"task failed:? amp-img#4#P amp-img#4:? Failed HTTP request for img.​?​?​?">?::before?</img>? .
Uncaught Error: task failed: amp-img#5#P amp-img#5: Failed HTTP request for img.???
Uncaught Error: task failed: amp-img#4#P amp-img#4: Failed HTTP request for img.???

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