Reference to 'Protocol' is ambiguous - xCode 10.2

Hi!

I have this problem since I updated my xcode to 10.2 version.

#import "SomeProtocol.h"

@interface SomeView : UIView 

@property (nonatomic, nullable, copy) NSArray <id <SomeProtocol>> *items;

The compiler brings me this error on line 05

• Reference to 'SomeProtocol' is ambiguous
• Type arguments cannot be applied to non-class type 'id'

It's important to say that this error pops up on one of the libs I use when it is integrated to the main app, but it doesn't when it is compile alone.

Here's the SomeProtocol:

@protocol SomeProtocol 


- (nonnull NSString *)itemId;
- (nonnull NSString *)name;
- (nonnull NSString *)price;
- (nullable NSString *)discountDescription;
- (nullable NSString *)installmentDescription;
- (nonnull NSURL *)thumbnail;
- (nonnull NSURL *)actionURL;
- (BOOL)isFreeShipping;

- (nonnull NSString *)type;

- (nullable NSButton *)secondaryAction;

@optional
- (nullable NSString *)attributes;

@end

Thank you for your help!