So first what are you gonna do is set this guide in your favourite guides on steam profile .... (atleast level 10)
and then when you scroll all the way down you cant see any save button so what are you gonna do is sellect something else ... not favourite guide ... or swap to different favourite guide and you can see that big green save button, you will right click on it and press inspect or F12 and then you can see all "script" for that green save button

<button type="submit" class="btn_green_white_innerfade btn_medium">
<span>Save Changes</span>
</button>

This is that script and when you copied it you will select again this or my other guide where this broken image is and then you will dont see any save settings and this is where you need that script .... you will see any clickable text on your profile settings (for example Link with facebook) you will right click on it and inspect again

<a class="btn_grey_white_innerfade btn_small" href="javascript:LinkFacebook();">
<span><img style="width:16px;height:16px;margin-right:4px;vertical-align: text-bottom;" src="https://steamcommunity-a.akamaihd.net/public/images/skin_1/facebook_logo.png"> Link with Facebook</span>
</a>

On that facebook link you will see all this and then you will right click on this - http://prntscr.com/q8bdxf and you will edit it as html ... you will remove all text from there and paste that script that i posted here

<button type="submit" class="btn_green_white_innerfade btn_medium">
<span>Save Changes</span>
</button>

↑- This one
and you will see that it changed from facebook to save button and now you can easily save and you are done ... congrats

©Yippie