Bad characters In Post

I have strange characters replacing apostrophe’s.

Here’s an example:

https://bizdevweekly.com/2016/02/19/7-inconvenient-truths-about-content-marketing-4/

“… soloproeneurs? and small businesses owners. And ita??s certainly not the panacea ita??s been made out to be. The interactive web –? social media, blogs, videos, etc. –? has made content marketing relatively easy and inexpensive. And therein lies the rub. As with…”

https://www.ads-software.com/plugins/rss-post-importer/