After carefully reviewing your code, I found approximately 50 coding errors.
To ensure accuracy, I utilized the W3C Markup Validation Service on the source code you provided from GitHub, revealing a total of 565 coding errors.
This high number of errors indicates potential issues with your webpage and could lead to challenges with maintenance and troubleshooting in the future.
While my usual recommendation would be to re-structure your code to meet valid and semantic standards, given that you are working within a template framework, this may not be feasible at this time.
Your mention of encountering issues after adjusting image widths prompted me to investigate further despite the numerous errors.
Your decision to reference a functioning template from another website was beneficial. By comparing the codes side by side, I pinpointed that your code lacked crucial div elements responsible for rendering HTML pagination links.
More specifically:
<div class="blog-pager" id="blog-pager"></div>
...was conspicuously absent from your codebase.
Your Site
https://i.sstatic.net/tUV3j.png
Other Site
https://i.sstatic.net/ddasK.png
Restoring this omitted code block should rectify the issue with your pager display.