About 5% of CBS’s All Access users had problems accessing the over-the-top streaming service on Sunday night — just as the latest episode of flagship original series “Star Trek: Discovery” debuted.

“A small number of CBS All Access users experienced problems with buffering last night due to technical issues with one of our delivery partners,” a CBS rep said in an emailed statement. “We worked closely with them to resolve the issue.”

CBS did not identify the content-delivery network in question. According to a source, Akamai Technologies was the CDN that encountered technical issues on its network that led to the All Access problems.

Asked for comment, an Akamai rep was not immediately able to provide details on what caused the service problems.

The “Star Trek: Discovery” revival, available in the U.S. exclusively on CBS All Access, has been a hit: The show was responsible for nearly doubling the Eye’s mobile subscription revenue for the OTT service, according to research firm App Annie. CBS on Monday announced the renewal of the sci-fi series for a second season.

In the wake of the streaming glitches Sunday, CBS is responding to user requests for refunds or credits on a case-by-case basis.

Multiple users complained on social media about problems accessing All Access on Sunday, as reported by Screen Rant.

Star Trek Discovery is great, but CBS All Access is, unsurprisingly, a trainwreck. Should've just put it on Netflix like in other countries. — Harry Nelson (@_____________h) October 23, 2017

CBS All Access offers more than 9,000 episodes on-demand and live-streaming access to local CBS stations in most U.S. markets. The service costs $5.99 per month after a one-week free trial, or $9.99 monthly without ads in the VOD content.

The broadcaster hasn’t disclosed how many All Access subscribers it has signed up, but CBS chief Leslie Moonves told investors that All Access and Showtime SVOD combined are on track to exceed 4 million subs by the end of 2017.