1) You activated TikTok anti-spam rate limits

TikTok dynamically throttles or blocks “bursty” activity (such as mass following) to defend against bots.

“To avoid spamming, we can deactivate the account of a user within 24 hours.” — TikTok Support

What is to be done

• Discontinue all follow-up activities for 24 hours.
• Next time, follow in small, natural batches (e.g., 5–10 at a time, then rest). Add regular interaction (watch, like, comment) so your activity looks human.

Remarks: TikTok does not post specific hourly/daily restrictions. Estimates vary by community, so consider any particular number to be guidance, not a rule.

2) You have been blocked by the individual you are following

When you are blocked, you cannot interact with the person or see their content.

“To block a TikTok user is to prevent seeing one another, searching each other out, or sending direct messages to one another.” — TikTok Support

What is to be done

• Attempt to access their profile through a different account or browser. If it fails to load or shows minimal info, presume you were blocked.
• There is no technical workaround—only the other person can unblock you.

3) Service/platform problems (It is not your fault)

Follow may seem broken even when your account is working, due to outages or partial feature failures.

“Downdetector counted 44,000 reports… before normal service was restored about 12AM ET.” — The Verge

What to do

• Check live status/complaints on trusted outage trackers.
• Compare the web version (tiktok.com) with the app.

4) App bugs, version outdated, or a full cache

Glitches can happen after updates or due to corrupted local data.

Fix it

• Update TikTok in the App Store or Google Play.
• Clear cache: Profile → Menu → Settings & privacy → Free up space → Clear cache (then force-quit and reopen).
• If needed, reinstall the app. (You won’t lose posted videos; drafts stored only on the device will be lost.)

5) Privacy settings, Family Pairing, or account restrictions

Certain settings/features (e.g., Family Pairing) can limit interactions at the account level; being underage or under guardians’ controls may also restrict features.

Fix it

• Review Settings & privacy → Privacy and any Family Pairing rules on the guardian account. (TikTok documents how blocking/restrictions affect visibility and engagement.)

6) You could be at a very high “Following” number

TikTok does not publicly state a maximum Following total. Many users cite a practical cap in the five-figure range. If you are following thousands of accounts and cannot follow new ones:

Fix it

• Unfollow inactive/low-relevance accounts to free headroom.
• Keep your Following list aligned with your niche so your activity appears natural.